38 lines
1.3 KiB
JavaScript
38 lines
1.3 KiB
JavaScript
import { useMemo, useState } from 'react';
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import useIsomorphicLayoutEffect from './useIsomorphicLayoutEffect';
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import { isBrowser, noop } from './misc/util';
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var defaultState = {
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x: 0,
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y: 0,
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width: 0,
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height: 0,
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top: 0,
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left: 0,
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bottom: 0,
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right: 0,
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};
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function useMeasure() {
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var _a = useState(null), element = _a[0], ref = _a[1];
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var _b = useState(defaultState), rect = _b[0], setRect = _b[1];
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var observer = useMemo(function () {
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return new window.ResizeObserver(function (entries) {
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if (entries[0]) {
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var _a = entries[0].contentRect, x = _a.x, y = _a.y, width = _a.width, height = _a.height, top_1 = _a.top, left = _a.left, bottom = _a.bottom, right = _a.right;
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setRect({ x: x, y: y, width: width, height: height, top: top_1, left: left, bottom: bottom, right: right });
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}
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});
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}, []);
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useIsomorphicLayoutEffect(function () {
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if (!element)
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return;
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observer.observe(element);
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return function () {
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observer.disconnect();
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};
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}, [element]);
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return [ref, rect];
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}
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export default isBrowser && typeof window.ResizeObserver !== 'undefined'
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? useMeasure
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: (function () { return [noop, defaultState]; });
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